HamiLoop vs Arrow Loop

HamiLoop: Draw one loop. Pass through every square on the grid exactly once. That's the whole idea behind HamiLoop, and it's harder than it sounds. What looks like a simple rule turns into a real puzzle once the grid grows, and figuring out the right path can take real thought. Grid sizes vary a lot, so difficulty varies with them. Some puzzles are solved in a couple of moments, others take much longer and require some careful planning. With 150,000 preloaded levels, you can pick a size and difficulty that suits your mood, and a new difficult puzzle is added every day if you're after something tougher. There are no timers and no countdowns anywhere in the app, so every puzzle can be worked through at your own pace. Each puzzle is presented with clean, colorful visuals, though the colors are purely decorative and don't affect the solving itself. If you like tackling more than one thing at a time, you can keep several levels open in parallel, so an easier puzzle is always there when you want a break from a harder one. Alongside the daily challenge, an extra hard puzzle is released once a week for players looking for something tougher still. The core idea of the game is inspired by Hamiltonian cycles, a well known concept from graph theory, giving the puzzle a solid mathematical foundation beneath its simple rule.

Sharpen your logic in quiet focus. One loop. A handful of black cells. That's the whole rule— yet the deeper you look, the clearer your mind becomes. Guided by arrow-and-number clues, link every empty cell into a single closed loop, and shade exactly as many black cells as each arrow points to. That's Arrow Loop. No server, no account—everything stays on your device. WHAT YOU GET - A loop-and-shade logic puzzle: draw the path, shade the cells—two tactile modes - Always one solution: a solver verifies uniqueness as each board is built - Four difficulty tiers: from a gentle 6×6 to a fierce 12×12 - Today's puzzle: seeded by the date, the same board for everyone, worldwide - Two input modes: drag to draw the loop, tap to shade—simple and direct - Gentle assists: toggle mistake-highlighting, or take a quiet hint - Records & streaks: solves, average time, and daily streaks, shown calmly - Fully offline: play anywhere, no signal needed - English & Japanese, in a calm, paper-and-ink look MADE FOR YOU IF - You want to turn a few spare minutes into quiet, focused thinking - You love Slitherlink, Nurikabe, or nonograms - You're tired of ad-heavy, account-required puzzle apps - You care about the satisfying click of a single, certain answer - You want a small pre-sleep ritual with no notifications chasing you